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以A106管材钢为研究对象,进行了小冲杆断裂试验,获得断后试样的最小厚度;在对试样断裂后的变形分析中,建立了试样厚度减薄率与温度的关系,规避了低温试验中载荷和位移测量不准确导致小冲杆能量转变温度不确定的问题。结果表明:基于厚度法可以准确确定小冲杆断裂试验的能量转变温度;小冲杆断裂试验后,试样最薄厚度的减小率与温度曲线关系呈现S型,有上平台、转变区、下平台三个典型区域;根据厚度减薄率与温度曲线关系可以得到小冲杆的能量转变温度。采用厚度法得到的小冲杆断裂试验的转变温度与能量法获得的结果基本一致。
Taking A106 pipe steel as the research object, a small punch breaking test was carried out to obtain the minimum thickness of the specimen after the breakage. In the deformation analysis after the breakage of the specimen, the relationship between the thickness reduction rate of the specimen and the temperature was established and avoided Low-temperature test load and displacement measurement inaccurate led to the small punch energy transfer temperature uncertainty problem. The results show that the energy transition temperature of the small punch rupture test can be accurately determined based on the thickness method. After the small punch rupture test, the relationship between the decrease rate of the thinnest thickness and the temperature curve shows the S-type, Under the platform three typical areas; according to the relationship between the thickness reduction rate and the temperature curve can be small punch energy transition temperature. The results of the transition temperature of the small punch fracture test obtained by the thickness method are basically the same as those obtained by the energy method.